laminating film

The film used to encapsulate a leaf, map, etc.,
undergoing LAMINATION .

The "ideal" laminating film should: 1) be
flexible, i.e., capable of withstanding all the
flexing and folding that is required of the paper
being protected throughout the useful life of the
document; 2) be (considerably) stronger than the
paper it protects. (Since the majority of papers
found in archival collections exhibit an
elongation of about 2% upon rupture, the film
should offer satisfactory strength at an
elongation of less than 2% to protect the
document, and should also have sufficient strength
to make reinforcement with tissue unnecessary); 3)
have considerable elongation beyond the yield
point of a stress-strain curve. (Because high edge
tearing resistance is usually associated with high
elongation, a narrow margin of film around the
edges of a document would protect it in case of
strain at the edges); 4) have properties enabling
it to resist degradation; 5) be capable of being
joined to the document with minimum effort,
preferably without application of heat and
pressure; 6) permit separation of the film from
the paper with minimum effort and without damage
to the document; 7) be resistant to abrasion; 8)
be transparent to light, at least throughout the
visible spectrum; and 9) contain no elements or
other substances which might in any way damage the
document it protects. (303 , 364 )